It would go in a landfill.
I contacted Richard Allen of EcoBunker and he kindly provided a response to Ben's charges. See below.
Ben, I'm curious to know if you ever refused, on a point of principle, to play hockey on an artificial pitch?
Over and out.
Fire risk- we did actually test it at the start and tried to set it on fire with naked flames. There was some scorching and localised melting but the material doesnít continue to burn after the source flame is removed. It would take a very determined prolonged act of vandalism to cause noticeable damage. In other words, unless you drench it with an accelerant like petrol , you canít set it on fire and leave it burn. Regarding the ecobunker walls, the same comment- but this time we can point to literally thousands of bunkers worldwide over the last 10 years and not one single report of fire. (A cheeky point perhaps- iíd say with a fair degree of certainty that peat-rich natural revetting turf , during a hot dry summer would be far more at risk of burning- a golf course i was a member of, with a high peat content underneath actually had a ban on smoking in 1983 because the 13th fairway was smouldering all summer, with worries about the rest of the course going up in flames too- true story)
Is it recycled or reused? A debatable point, and perhaps not that important, but we do carry out careful reprocessing. We calculated the weight of the material, and cut it into sizes that can be installed by hand , negating the need to use heavy lifting apparatus. We also developed a jointing technique and we are very selective on the type of artificial turf thatís used for lining (we use 1st generation needlepunch turf) which has a very high density of fibres - much more dense than more commonly used 2nd generation sand fill - which is the usual type for hockey pitches. It would take a really determined , deliberate effort to cause any damage to it...